Densification of WC-Fe-Ni-Co-Cr cemented carbides processed by HIP after sintering: effect of WC powder particle size
Tomás Soria-Biurrun, Lorena Lozada-Cabezas, Jazmina Navarrete-Cuadrado, Federico Ibarreta-López, Roberto Martínez-Pampliega, J.M. Sánchez
Abstract
Shrinkage, liquid formation and mass losses of WC-19 vol% FeNiCoCr alloys during sintering have been investigated in compositions either with coarse or submicron WC powders. Mass losses detected by thermogravimetry are compatible with carbothermal reduction of the different oxides present in the powder mixtures. Hardness and fracture toughness of materials based on submicron WC powders are within tolerances of those reported for WC-Co materials with similar microstructures. However, fracture strength is approx. 25% lower.
Topics & Concepts
Materials scienceSinteringFracture toughnessMicrostructureMetallurgyShrinkageCarbideCarbothermic reactionParticle sizeTungsten carbideParticle (ecology)Composite materialThermogravimetryChemical engineeringOceanographyGeologyEngineeringAdvanced materials and compositesPowder Metallurgy Techniques and MaterialsOrthopaedic implants and arthroplasty